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(No Model.)

P. A. OALLEY. TENSION DEVICE FOR KNITTING MACHINES, &c. No. 398,127.

Patented Feb. 19, 1889.-

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WITH/8858 ATTORNEY;

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UNITED STATES PATENT OFFICE.

FREEMAN A. CALLEY, OF PAWTUOKET, RHODE ISLAND, ASSIGNOIR TO THE E. JENKS MANUFAC"URIN G COMPANY, OF SAME PLACE.

TENSION DEVICE FOR KNITTING-MACHINES, C.

SPECIFICATION forming part of Letters Patent No. 398,127, dated February 19*, 1889.

Application filed July 2'7, 1887- Serial No. 245,416. (No model.)

To aZZ whom it may concern.-

Be it known that I, FREEMAN A. CALLEY, of Pawtucket, in the county of Providence and State of Rhode Island, have invented certain new and useful Improvements in Tension Devices for Khitting-Machines, &c., of which the following is a specification.

This invention relates to certain new and useful improvements in tension devices for knitting or sewing machines; and the object of my invention is to provide a new and improved tension device by means of which the tension of the thread can be regulated automat-ically and the thread oiled at the same time.

The invention consists in the construction and combination of parts and details, as will be fully described and set forth hereinafter, and then pointed out in the claims.

In the accompanying drawings, Figure 1 is a side view of my improved tension-regulating device for knitting and sewing machines. Fig. 2 is a plan view of the same. Fig. 3 is a cross-sectional view on the line a: :c, Fig. 2. Fig. 4 is a cross-sectional View on the line y y, Fig. 2. line 2 .2, Fig. 2, and a top view of the eye.

Similar letters of reference indicate corresponding parts.

The horizontal bar A is held in a fixed position, and is preferably supported at its middle by a short standard, B. The arm A of the bar is made fiat on top, and at the middle of the bar A the fiat part A is provided on one side. From the central part of the bar A the tubular standard 0 projects upward, the bottom of the bore of said standard being flush with the flattened top of the arm A. Said tubular standard is provided at its bottom with two opposite apertures, a a, in line with the longitudinal axis of the bar, and at one side said tubular standard is provided with a short vertical slot, D.

In the tubular standard 0 a tubular block, E, is mounted to slide vertically, and is provided in its bottom with an opening, F, above which a packing-piece, G, of felt or cotton waste or like material, is held in said tubular block, and on the packing-piece G the lower end of a spiral spring, H, rests, the upper end Fig. 5 is a cross-sectional view on the of which rests against the under side of an internally-screw-threaded cap, J, screwed on the externally-screw-threaded upper end of the tubular standard 0. Said cap is provided with a central aperture, K, through which oil can be poured, which is absorbed and retained by the packing-piece G.

A pin, L, projects from the side of the tubular block E at the bottom and through the side slot, I), and rests upon the edge of a cam, M, pivoted to the flattened side part, A of the bar A. Said camis provided with an arm, M, carrying the adjustable tensioirweight N, and with an arm, .0, substantially at right angles to the arm M, and provided on its end with the eye 0. From the outer end of the arm A the lug P projects upward, andto the same the lever Q is pivoted, which .rests upon the flattened upper surface of the arm A, and is provided on its swinging end, which is adjacent to the tubular standard, with the laterallyprejecting lug which rests upon the rim of the cam M, as shown in Fig. 2. On the other end of the barAthat is, 011 the end opposite the free end of the arm Athe eye R projects upward, and in the opposite ends of the bar A the eyes S and T are formed.

The thread 072 is passed through the eye T under the lever Q, the swinging end of which rests upon the thread and presses it upon the flat top surface of the arm A, and then through the two opposite apertures a in the tubular standard 0, the'bottom of the sliding block E resting on that part of the thread passed through the tubular standard. The thread is then passed through the eye R, through the eye 0 in the end of the arm 0, and through the eye S. The spiral spring H presses the lower end of the block E upon the thread m, whereby the thread is pressed upon the bottom of the bore of the tubular standard and is held with a certain tension. The end of the lever Q resting on the thread also increases said tension. The pressure of the block E on the thread can be regulated by screwing the cap J up or down on the tubular standard C. The oil in the packingpiece G flows from the same down upon the thread and lubricates the same.

In case there is any slack in that part of Ice the thread drawn from the eye S the weighted arm M swings down and block E is pressed upon the thread and the swinging end of the lever Q swings down upon the thread and the tension in the thread is increased, and this tension or strain draws down the arm 0, causing the edge of the cam M to act on the pin L and the lug Q of the lever Q,which are both raised, whereby the tension or strain in the thread is decreased. As soon as the thread slackens, the block E and lover Q immediately descend and the tension is increased, and so on.

I do not claim, broadly, a pivoted take-up sweep and a spring-pressure plate engaged with the yarn at all times for applying the tension thereto, said plate beingindependent of the sweep and adapted to be operated thereby, and an adjustable power device for returning the sweep to its normal position, as this is old.

Having t-h us described my invention, I claim as new and desire to secure by Letters Patent 1. The combination, with a bar having thread-guiding eyes, of a tubular standard on the bar, a tubular slidingblock in the standard, which block has abottom aperture, and a packing-piece-such as felt or cotton wastein said block, substantially as set forth.

2. The combination, with a bar having thread-guiding eyes, of a tubular standard provided with apertures for the passage of the thread, a sliding block in said standard, a pin projecting from the block through a slot in the standard, a cam pivoted on the side of the bar, which cam can act on the pin 01: the sliding block, a weighted arm on the cam, and an arm provided with an eye on the cam, substantially as set forth.

3. The combination, with a bar having thread-guiding eyes, of a tubular standard provided with apertures for the passage of the thread, a sliding block in the standard, a lever pivoted on one end of the bar and having its swinging end resting on the top of the bar,a cam acting on said lever and on the sliding block, which cam is provided with a weighted arm, and an arm having an eye, substantially as set forth.

at; The combination, with a bar, A, having opposite thread-guiding eyes, the lug P on one end of the arm, the lever Q, pivoted on said lug and provided with a laterally-projecting lug, Q, on its swinging end, the cam M, pivoted to the side of the bar and provided with a weighted arm, M, and the arm 0, having an eye, the tubular standard O on the bar, a sliding block in said standard, and a pin projecting from the sliding block through a slot in the standard, which pin rests on. cam M, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

FREEMAN A. CALLEY.

Witnesses:

OSCAR F. GUNZ, SIDNEY M ANN. 

